Here's a quick summary that I scanned with my eyes from the book he showed me (without buying).
- Size 20 & 22
- Dark/gray wings with amber body
- Hatches particularly around Muleshoe Bend of Firehole when water gets warmer
- Also hatches en masse
- Causes lots of frustration among anglers
- Up-stream casting refused
Well, I'm not much of a up-stream dry-fly caster anyway at least. That might have been why I managed to entice a few trout by just the size of caddis flies.
At Blue Ribbon Flies, they have all kinds and colors of dubbings. I did pick up right ones. Craig suggested me to mix these to a bit.
At my motel room, I tied up about a dozen flies quickly. Top ones are Iris Caddis and Nick's Soft-hackle for White Miller and bottom ones are X, Iris, and Nick's for Helicopsyche.
Helicopsyche X Caddis is here, tied with TMC 102Y #21.
As I went to Muleshoe Bend around 5:00pm, trout were rising. Again, White Miller caught my eyes but I tied on Helico patterns. It did work!!! Trout rose to my fly positively, not skeptically any more!!
I had to shoot a quick grip-&-grin!!
Also, what I noticed was that trout really suck on this tiny caddis (and my flies). I was sure my hook-set was as right as any other experience but somehow this tiny pattern was set into throats rather than around mouths. Very puzzling.
As I was inspecting my flies in my motel room, Helico X tied with TMC hook was gape-open.
Probably this is one of the reason that Firehole is referred as "strangest trout stream on earth".
This evening was a great experience for me that I can't express in words. And I believe that's what's all about fly-fishing. I observed what was going on on the water, asked experienced anglers, tied right flies, fished with them, and caught trout.
Yet I had experienced another development in the following evening.............